audreyh1
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None of those thing prevent a depression. The question was about prevention. There have been 10 contractions since 1940. If contractions can not be prevented; how can depressions be prevented? They are a more severe downturn than a recession.
You don't have to prevent a contraction to avoid a depression, you just have to have mechanisms in place that limit how bad contractions get. That is the whole point of most of the policies - and a big part of the Fed's job. And other policies try to limit things that make business cycle volatility worse on both extremes - things like leverage.
Audrey